From 7dda4e01bc5cfa5d5533f15a5729dff04292d4dc Mon Sep 17 00:00:00 2001
From: Javier Sancho <jsf@jsancho.org>
Date: Mon, 11 May 2020 14:19:37 +0200
Subject: [PATCH] begin-scene

---
 irrlicht.scm       |  1 +
 irrlicht/video.scm | 18 +++++++++++++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/irrlicht.scm b/irrlicht.scm
index 6f11ed3..b1c3a82 100644
--- a/irrlicht.scm
+++ b/irrlicht.scm
@@ -27,6 +27,7 @@
   #:re-export (add-animated-mesh-scene-node!
                add-camera-scene-node!
                add-static-text!
+               begin-scene
                create-device
                get-gui-environment
                get-mesh
diff --git a/irrlicht/video.scm b/irrlicht/video.scm
index f0f56a3..0d0b37f 100644
--- a/irrlicht/video.scm
+++ b/irrlicht/video.scm
@@ -20,6 +20,7 @@
 
 (define-module (irrlicht video)
   #:use-module (oop goops)
+  #:use-module (ice-9 optargs)
   #:use-module (irrlicht base)
   #:use-module (irrlicht foreign))
 
@@ -35,6 +36,21 @@
 (define-class <video-driver> (<irrlicht-base>)
   (irr-class #:init-value "IVideoDriver" #:getter irr-class))
 
+(define-method (begin-scene (video-driver <video-driver>) . rest)
+  (let-keywords rest #f
+        ((back-buffer #t)
+         (z-buffer #t)
+         (color '(255 0 0 0))
+         video-data
+         source-rect)
+    ((get-irrlicht-proc "beginScene" video-driver)
+     (irr-pointer video-driver)
+     back-buffer
+     z-buffer
+     color
+     video-data
+     source-rect)))
+
 (define-method (get-texture (video-driver <video-driver>) filename)
   (make <texture>
     #:irr-pointer
@@ -42,4 +58,4 @@
      (irr-pointer video-driver)
      filename)))
 
-(export <video-driver> get-texture)
+(export <video-driver> begin-scene get-texture)
-- 
2.39.5